Valve.



. w. s. FAIRHURST.

' VALVE.

APPLICAJ'ION FILED DEC. 51 1914- 1,153,051.

Patented Sept. 7, 1915;

Winemae5- movement away WILLIAM S. FAIRHURST, OF NEW'YORK, N. Y.

VALVE/ Specification of Letters regent.

Patented Sept. '7, 1915.

Application filed December 5, 1914. Serial No. 875,651.

To all whom it may concern:

Be it known that 1, WILLIAM S. FAIR- HURST, a citizen of the United States, and resident of the borough of Brooklyn, in the 5 city and State of New York, have invented a new and useful Improvement in Valves, of

which the following is a specification.

This invention relates to valves with the object to provide certain improvements in the construction, form and arrangement of the several parts whereby its operationis facilitated and its structure simplified and it is capable of use either as a suction valve or as a discharge valve.

A practical embodiment of my invention is represented in the accompanying drawings, in which Figure 1 represents in section a portion of a fluid compressor with a suction and a discharge. valve applied thereto, Fig. 2 represents a horizontal section taken in the plane of the line A-A of Fig. 1, Fig. 3 represents a plan view of the valve proper, and Fig. 4: represents a side view of the same.

The cylinder, denoted by 1, is shown as provided with the usual cylinder head 2 having an inlet port 3 and an outlet port 4. The cylinder head 2 is also provided with an inlet valve seat 5, a fluid passage 6 therethrough, and an outlet valve seat 7 having a fluid passage 8 therethroug The valve is formed of spring sheet metal, such as steel, and comprises an annular portion 9 and two or more inwardly projecting spring arms 10. In the present instance, I have shown two of these arms 10 diametrically opposed and provided with yokes 11, which together are adapted to embrace the smooth portion 12 of a guide pin 13, projecting from a central hub 1 1* of a retainer plate 14 of the suction valve. The retainer plate 1 1 is secured to the head 2 by the guide pin 13 having a threaded engage-' ment therewith and locked to the head by a nut 15.

A coil spring 16, formed of flat wire, is interposed between the annular portion 9 of the valve proper and the retainer plate 14, and it is seated in an annular recess 17 the retainer plate, which spring serves a to hold the valve normally closed. I

The spring arms 10 of the valve proper permit the valve to be self-yielding after the valve has reached the limit of its bodily from the valve seat. When the valve is used as a discharge plate 19,

- spring sheet wear upon the valve valve, the yokes of the arms 10 embrace the smooth portion of a screw threaded guide pin 18, tapped into the head 2. The

outer end .of the guide pin is threaded to rece1v e a retainer plate 19 and is locked in pos1t1on on the pin by a nut 20. The retainer plate 19 is provided on its face adjacent to the valve seat with a projecting hub 19* through which the guide pin 18 passes. A coil spring 21 formed 'of flat wire is interposed between the annular portion 9 of the valve proper and the retainer and it is seated in an annular recess 22 in the retainer plate, which spring "serves to hold the valve normally closed.

It is intended to make the valve proper of steel, thereby better enabling the valve to withstand the constant hammering on its seat due to the rapidity of oper ation of the valve, and insuring a long life therefor. It will also be seen that the valve proper has a bodily movement. toward and away from its seat and that it also has a self-yielding movement thus permitting a very wide opening of the valve with a relatively short movement of the valve on its guide. I also prefer to use with the valves,

flat C0ll springs, thereby preventing undue proper. The centrally projecting hubs 1 F and 19* of the suction and discharge valves, serve to engage the arms 10 upon the opening.

movement of the valves, thereby preventing the annular portion of the valves from str1L- ing the plate or shivering, which causes the valve to crack or break when operated at high speed.

While I have shown this valve in connection with the cylinder head of a fluid compressor, it is to be understood that the valve may be used wherever applicable.

What I claim is:

1. A sheet metal valve comprising an annular portion having inwardly projecting arms which together are adapted to embrace. v

a central guide.

2. A sheet metal valve comprising an annular portion having inwardly projecting arms having yokes which together are adapted to embrace a central guide.

3. A valve comprising a valve seat,a valve retainer plate, a guide pin connecting the plate with the seat and a sheet metal valve proper comprising an annular portion having inwardly projecting arms which together are adapted to embrace said pin.

' plate with the 4. A valve comprising a valve seat,a valve retainer plate, a guide pin connecting the Seat, and a sheet metal valve proper comprising an annular portion having inwardly projecting arms, which together are adapted to embrace said pin, and

pin.

lng'inwardl'y projecting arms, having yokes which togetherare adapted to embrace said 5. A sheet metal valve comprising an annular portion having two inwardly and oppositely projecting arms having yokes which together are adapted to embrace a central guide.

61A valve comprising a valve seat, a valve retainer plate, aguide pin connecting the plate with the seat and a sheet metal valve proper comprising an annular portion hava flat coil spring interposed between said annular portion retainer plate, plate with the seat, a sheet metal valve of the valve proper andthe proper comprising an annular portion having inwardly pro ecting arms having yokes which together are adapted to embrace said pin, and a fiat coil spring interposed between said annular portion of the valve proper and the retainer plate. v 9. valve comprising a valve seat, avalve retainer plate provided with a projecting hub, a guide pm connecting the plate with the seat, and a sheet comprising an annular portion having inwardly projecting arms which together are adapted to embrace said pin.

In testimony, that I claim the foregoing as my invention, I have signed by name in presence of two Witnesses, this seventeenth day of November 1914.

Witnesses:

F. GEORGE BARRY, HENRY C. THIEME.

metal valve proper WILLIAM S. FAIRHURST. 

